Portable angular boring bar with grinder



March 25, 1941. R. E. GIGNoux PORTABLE ANGULAR BORING BAR WITH GRINDERFiled April 2, 1940 3 Sl'leelzs-SheerI l March 25, 1941.

R. 4r;. GlGNoux PORTABLE ANGULAR BORING BAR WITH GRINDER Filed April 2,1940 5 sheets-sheet 2 March 25, 1941. R. E. GIGNoUx PORTABLE ANGULARBORING BAR WITH GRINDER s sheds-sheet 5 Filed April 2, 1940 PatentedMar. 25, 14941 PATENT @FICE PORTABLE ANGULAR BORING BAR, WITH GRIN DER

Ralph Ernest Gignoux, Bakersfield, Calif., assignor to Hopper MachineWorks, Inc., Bakersfield, Calif., a corporation of CaliforniaApplication April 2, 194i), Serial No. 327,486

is claims.

The equipment of my invention has been especially designed to grind aninternal taper in slush mud Dumps of a type used to pump the s'lushingmud in deep and oil well drilling. In these types of pump the removablevalve seat fits on a slight tapered surface in the casting from part ofthe pump, there being a relatively large chamber above the valve seatand an opening in the casting in axial alignment with the seat. In theuse of these pumps on account of the sand and other grit carried by theslushing mud, the cast metal black of the removable valve seat becomeseroded. It is hence necessary to grind the cast metal to obtain a truetaper to receive a re- 1 placement valve seat. On account of theconfined space it is a considerable problem to insert a rotary grinderand to manipulate this to grind the bearing surface for the valve seat.Certain of the problems involved in the provision of a construction bywhich the motor may be inserted through the opening in the casting intothe space or cavity and to have a grinder attached to and operated bythe motor with a suitable surface to grind the desired taper. Further,the axis of the grinder must be capable of a tilt to conform to thedesired taper of the bearing surface, the grinder must revolve on itsaxis and also turn in a circle somewhat in a planetary type of motion togrind the full circle of the bearing. It further must have alongitudinal motion to complete the full length of the bearing surfaceand move radially outwardly as the grinding progresses to a greaterdepth in the metal of the pump. Other problems arise in that the toolmust be portable to grind the bearings in the mud pumps without thenecessity of dismantling the pumps and taking them to a shop to be setup for a larger and more readily manipulated grinding tool. Due to thedifferent sizes of exterior openings in the pumps, the space or cavityadjacent the valve seat and the different sizes in diameter of theseseats, it is necessary to provide one tool which may be accommodated tothe considerable range of sizes in the pumps or other equipment to beground.

Therefore an object and feature of my in vention involves a suitablestepped base which lits the opening in the casting ofthe pump, the stepsproperly seating themselves and to this base is secured an upper orsecondary base having a cy lindrical outer bearing surface and a ringbearing surface connected therewith to accommodate the portion of thesupporting mounting which is required to rotate in a circle. Rotatablymounted in the upper base I provide the cross feed sup- (Cl. Elf-245)port which has a circular bearing plate rotatable in the upper base onthe angle bearings and by means of a ring gear attached to the upperpart of the cross feed support and by use of a worm pinion mounted in afixed position as to the base, the rotating part of the supportingequipment may be turned in a complete circle, the rotation beingcontinued until the grinding work is completed.

A further feature of my invention is the employment of a cross feedbracket which is mounted for transverse sliding motion on the cross feedsupport. This bracket has an opening for passage of an arbor or grindingbar. To obtain the transverse motion a feed screw is utilized. In orderto obtain the angular tilt of the grinding bar or arbor, I provide anarbor guide having an elongated sleeve preferably rectangular on theinside surface to accommodate a rectangular boring bar. This is tiltedby means of a tilting plate pivoted transversely to the cross feedbracket. I also provide a clamp for the upper end of the boring bar witha screw feed connection to the supporting part of the structure by whichthe boring bar with the motor mounted on the inner end thereon and thegrinder may be moved axially as to the opening in the pump andlongitudinally of the surface to be ground.

My invention is illustrated in connection with the accompanyingdrawings, in which:

Fig. l is a vertical section substantially on the line I--l of Fig. 4 inthe direction of the arrows, the boring bar and certain other centralelements being illustrated in elevation.

Fig. 2 is a central vertical section of the collector ring assembly forthe electric leads to the motor.

Fig. 3 is a vertical section of the upper part of the tool takensubstantially on the line 3-3 of Fig. 4 in the direction of the arrows,part of the cross feed bracket and the assembly thereabove with theboring bar being shown in elevation and part of theV cross feed supportshown partly in elevation.

Fig. 4 is a transverse section on the line ll-ll of Fig. 1 in thedirection of the arrows.

Fig. 5 is a transverse section on the line 5 5 of Fig. 6 in thedirection of the arrows illustrating the manner of taper grinding.

Fig. 6 is a side elevation taken in the direction of the arrow 6 of Fig.3 or 4.

Fig. 7 is an elevation partly in section of a modified boring barassembly having an air operated motor actuating the grinder.

Referring to the general type of construction of the mud pump with whichthis tool is designed to be operated and referring particularly to Fig.6, a portion of a mud pump or other equipment is illustrated by thenumeral II, this usually being of cast metal and having an opening I2leading to the outside defined by the surface I3. Such opening isusually cylindrical. The taper bearing I4 is the surface on which thevalve seat is mounted and it is along the surface I4 that erosion takesplace where the sand or other grit works back and outside of theremovable valve seat. This is the surface to be reground to form asuitable and tight t with a replacement transverse seat, There is acomparatively large cavity or space designated I5 above the bearingsurface I4 and is used in my equipment to accommodate the motor.

Some of the stationary parts of the tool consisting of the supportingmembers include the stepped base 2l). This has a series of enlargedcylinders 2| with transverse annular shoulders 22 graduated in size, theshoulders being adapted to seat on the surface I3 of the casting and theshort cylinders to form a somewhat close t with the opening I2. Thisbase has a cylindrical inner surface 23 adjacent its lower end (noteFig. 1), an enlarging outwardly curved surface 24 thereabove and has anupstanding rim 25. The upper base member 88 has an inturned lower rim 3|screw threaded to the upstanding rim 25 and secured in a fixed positionby a set screw or the like. There is an outward extending annularportion 3?. and the peripheral outer wall 33 extending upwardly. Connedinside of this upper base there is a flat bearing ring 34 fitting on theannular section 32 and a cylindrical bearing ring 35 fitted inside theouter wall 33. A flat cap ring 35 is secured to the wall 33 by screws orthe like having a purpose hereunder defined.

Certain of the rotating elements include a substantial annular bearingplate 40. This is illustrated as rectangular in cross section andproviding a relatively large internal opening somewhat greater indiameter than the opening inside of the lower rim 3i. This bearing plateis machined and has a thrust bearing surface operating on the at bearingring 34 and a cylindrical peripheral surface operating against thecylindrical bearing 35. A ring 45 illustrated as substantiallyrectangular in cross section except for the shoulder iin 46 nts on topof the bearing plate 4I) and is secured thereto by a series of screws41, these extending upwardly through the bearing plate having headsfitting in a countersink on the lowei1 surface of such bearing plate 4D.The ring l5 is utilized for the support and mounting of the ring gear 4lwhich seats on the upper side of the iin i8 and against th-e outerportion of the periphery of the ring 45 being secured in place by keys,set screws or the like.

The cross feed support assembly 50 includes a structure either formedintegral with or attached to the ring e5, this consisting of twosubstantial bars 5I spaced apart and fitted across the interior circleformed by the vertical inside surface of the ring 85. Above these barsand preferably either welded or formed integral therewith there areguide bars 52, and strips 53 each of which has a guide seat 54 providedwith a horizontal and a vertical surface, these being parallel. Thebearing plate 55, it will be noted, is confined by the flat ring 38,this also having a close fit with the periphery of the ring 45 below theshoulder fin 45. This whole structure is designed to rotate by means ofa worm drive hereunder described engaging the ring gear 41, thus thewhole assembly including the bearing plate 40, the ring l5 and thetransverse bars 5I and 52 may be rotated in a circle and this is usuallyunder manual control.

In order to obtain a transverse movement, a cross feed bracket assemblyB is utilized. This has a bottom plate BI shown as having marginalparallel guide strips 62 which have a bearing and fit on the shoulderguides 54 of the transverse bars 52. This plate has an oval shapedopening 63 with its long axis in the direction of the length of theplate and its short axis therefore being transverse to this plate 5I. Apair of bracket posts 64 extend upwardly from the bracket plate at oneend and are provided with a pintle opening 65 at the bottom and a stoppin perforation 66 at the top through which is fitted the pintle B'I atthe bottom and the stop pin 68 at the top. One end of the plate 6I isprovided with a threaded radial opening 69 to receive the transversefeed screw 10. This screw is mounted and operated in th-e mannerhereunder described, the action being that the rotation of the screwmoves the complete assembly of the cross feed bracket transversely onthe guide bars 52 and this transverse feed may take place while theassembly is rotating due to the rotation of the bearing plate 40 and thestructures above described attached thereto.

The arbor guide assembly 88 includes a vertical plate 8l having itslower portion mounted on the pintle 61. This plate has a slot 82 at itsupper portion formed concentric with the pintle 67 and through such slotextends the stop pin 68, thus limiting the tilting movement of the arborguide plate. A substantial sleeve 85 is attached to the plate 8|. Thissleeve has splits 85 at its lower and upper ends and is externallythreaded, used for fitting the lower and upper grinder bar clamps 81.These clamps have suitable perforations or other devices providing awrench grip, the threads being slightly tapered to squeeze the ends ofthe sleeve against the internal bearing sleeve 9|] and thus clamp thegrinding bar 85. This grinding bar -extends completely through thesleeves 85 and 90 and is illustrated as hexagonal in cross section, theinside surface of the bearing sleeve 9Il of course being in similarcross section. This permits a longitudinal guided movement of thegrinder bar or arbor .but prevents rotational movement.

In order to obtain the longitudinal movement of the grinder or arborbar, a vertical motion feed clamp |00 is attached to the arbor adjacentthe upper end. This extends to one side and has a vertically threadedopening to receive the vertical feed screw IIJI, such screw having awrench grip at the top. The screw extends through a feed clamp |02 whichis secured to the vertical plate 8| of the arbor assembly 83. Upper andlower collars ID3 are pinned to the lower portion of the screw, thusrestraining vertical or permitting rotational motion and hence onrotation of the screw the clamp IIlll and hence the arbor or boring baris raised or lowered.

A transverse screw I0 operates through a bracket assembly IIB, noteFigs. 1 and 6, which is secured by screws to the ring 45. The screwoperates with a clearance through the bracket but is confined by setcollars III, thus giving a restraint to the screw so that the threadingof the same in and out of the threaded opening E9 develops a transversemovement of the cross feed bracket assembly 60.

The ring gear'l is rotated by a worinv |.|5, note Figs. 1 and 4. This ismounted on a worm shaft IIB journalled in a pinion shaft bracket thislatter being attached to the outside of the upper base 30 to theperipheral wall structure 33,- there being upwardly extending ears H8`confining the worm H5, thus as this worm shaft may be rotated in anysuitable manner and is mounted on a stationary part of lthe machine, thecross feed support including the ring 45 and the bars 5| and 52 arerotated in acircle.

The motor mounting |20, note particularly Fig. 1, includes a cylindricalhousing structure |2| provided with outer walls |22 and a base |23, thislatter being secured to the lower end of the arbor bar 95. I'his is openat the end and permits insertion of the motor |25. The motor shaft |26is preferably mounted to be in the axial `alignment with the arbor andhas the grinding wheel |27 thereon. This wheel is illustrated of thetype having a cylindrical grinding surface and of course this isconcentric with the shaft |26 and hence with the axis of the boring bar.

In the construction illustrated the motor is indicated as of an electrictype with the lead wires extending through the hollow center of thearbor. In order `to accommodate the rotary motion of the motor andgrinding assembly, a ccllector ring construction indicated at |35 isconnected to the upper end of the arbor, note particularly Fig. 2. Thisemploys -a bottom cap |36 secured to a cylindrical upper section of thear bor, a tube |3`| extending thereabove, a lower ,plate |38 secured tocap |36 and an upper plate |39 surrounding the pipe |31, the upwardlyextending plate being downwardly pressed by a spring IM! reactingagainst a collar |4`| engaging a sleeve |42 secured to the upper end ofthe pipe |311. A pair of terminals |45 and |46 are each `connected toouter and inner annular rings |41 and |48. Brushes |49 and |50 eachdownwardly pressed by a spring |69 and housed in a bushing |6| bear onthe lower outer and inner collector rings |62 and |63. The electricleads |64 and |35 are connected respectively to the outer and to theinner collector rings and lead through the hollow boring rod 95 to theelectric motor. By this construction or any other suitable collectorring assembly the electric current may be car-- ried through the slowlyrotating boring bar 95 which is rotated to follow the planetary motiondeveloped in the internal grinding of the desired surface.

The assembled machine rests on the casting to the tapered ground asshown substantially in Fig. 6, the various steps in the base covering arange of diameters of the opening I2. In addition the clamps arecommonly used to clamp the construction in position. By this `set up ofthe "tool it will be obvious that the grinder may be adjusted for thecorrect taper and when once adjusted and clamped the grinding wheelmounted on the motor shaft and reciprocated through the medium of theboring bar will al- Figs. 1 and 2 but of preferably larger sizedinternal bore. A nipple 2U2 isattached to the upper end and connected tothis nipple there is a swivel assembly 205 of a known type with acompressed air supply pipe 206 attached thereto. The air motor 2||J isattached to the end of the boring bar and has a driving shaft 2||actuating the grinder 2|2. As this equipment may be installed in thesame supporting structure of the above described iigures, it will beseen that the machine is suitable for either electric or air actuatedmotor drive of the grinder.

Various changes may be made in. the details of the construction withoutdeparting from the spirit or scope of the invention as defined by theappended claims.

I claim:

1. In a device as described, the combination of a hollow supporting baseadapted to fit on a pump at an opening therein, a bearing platerotatably mounted on said hollow base, a cross feed support assemblymounted on said bearing plate, an arbor guide assembly having a tiltingmounting on the cross feed support assembly, an arbor mounted in saidguide assembly extending through the bearing plate and the hollow base,a motor attached to the lower end of the arbor and a rotatable grinderconnected to and operated by the motor and means to feed the arbor in anaxial direcicn.

2. In a device as described, the combination of a lower angular steppedbase member adapted to seat on a pump or the like at an opening therein,an upper annular base member secured to the lower base member, anannular bearing plate rotatably mounted on the upper base member, across feed support assembly attached to the bearing plate, said supportassembly having a pair of parallel and transverse lguide bars, a crossfeed bracket slidably mounted on the said guide bars for transversemovement, a tilting arbor guide assembly mounted on said cross feedbracket, a boring bar slidably mounted in the arbor guide assembly, amotor having a grinding wheel connected to the lower part of said boringbar, means to rotate the annular bearing plate, means to transverselyshift the cross feed bracket and means to adjust the boring bar axiallyof the arbor guide assembly.

3. In a device as described, the combination of a hollow base memberadapted to seat on a pump or the like at an opening therein, an annularbearing plate rotatably mounted in the upper part of said` base andconned therein, a cross feed support assembly including a pair ofparallel and transverse guide bars rigidly secured to the annularbearing plate to rotate therewith, a cross feed bracket assemblyincluding a bottom plate and a pair of bracket posts, an arbor guideassembly including a vertical plate pivoted to the bracket posts withmeans to adjust the tilt of said vertical plate, the arbor guideassembly including a sleeve, a boring bar slidably mounted in the saidlatter sleeve and having a motor attached to the lower end of said barwith a rotatable grinding Wheel connected to and operated by the saidmotor, means to convey a power medium for the motor through the saidboring bar, means to rotate the annular bearing plate, means to transversely move the cross feed assembly bracket and means to longitudinally.feed boring bar through the arbor guide sleeve.

fl. In a device as described, the combination of a hollow base memberadapted to on a pump' or the like at an opening therein, an annularbearing plate rotatably mounted in the upperpart of the base and connedtherein, a cross -feed support assembly including a pair of parallel andtransverse guide bars rigidly secured to the annular bearing plate torotate therewith, a cross feed bracket assembly including a bottom plateand bracket posts, an arbor guide assembly including a vertical platepivoted to the lower part of the bracket posts with an adjustingconnection at the upper part of said posts, an arbor` guide sleevesecured to the vertical plate, a boring bar slidably mounted in suchsleeve and having a motor attached to its lower end with a rotatablegrinding wheel operatively connected to the motor, means to rotate theannular bearing plate, means to transversely move the cross feedassembly bracket and means to longitudinally feed the boring bar throughthe arbor guide sleeve.

5. In a device as described, the combination of a hollow base memberadapted to seat on a pump or the like at an opening therein, an annularbearing plate with a cross feed support having upward. extending bracketposts, an arbor guide assembly including a vertical plate pivoted to theybracket posts adjacent the lower portion thereof,

an adjusting means interconnecting the upper end of the plate and theupper end of the bracket posts, the arbor guide assembly having a sleeveattached to the pivoted plate, a boring bar eX- tending through thesleeve and having a motor connected to its lower end, a grinding wheeloperatively connected to the motor, a clamp secured to the boring barand an adjusting connection between said clamp and the arbor guideassembly to shift the boring bar longitudinally, means to rotate theannular bearing plate and means to transversely move the cross feedassembly bracket.

6. In a device as described, the combination of a hollow .base memberadapted to seat on the pump or the like at an opening therein, anannular bearing plate rotatably mounted in the upper part of said baseand confined therein, a cross feed support assembly including a pair ofparallel and transverse guide bars rigidly connected to the annularbearing plate to rotate therewith, a cross feed bracket assembly, aguide arbor assembly pivotally connected to the cross feed bracketassembly, a sleeve included in the arbor guide assembly, a boring barslidably mounted in said sleeve, a motor attached to the lower end ofthe bar, a grinding wheel operatively connected to the motor, means torotate the annular bearing plate, means to transversely move the crossfeed assembly bracket and means to longitudinally feed the boring barthrough the arbor guide sleeve.

7. In a device as described, the combination of a hollow base memberadapted to seat on a pump or the like at an opening therein, a bearingplate rotatably mounted in the upper part of the base and confinedtherein, a cross feed support assembly including a pair of parallel andtransverse guide bars rigidly connected to the annular bearing plate torotate therewith, the cross feed bracket assembly including a bottomplate slidably mounted on the said guide bars, an arbor guide assemblyincluding a sleeve and having a pivotal connection to the cross feedbracket as- Sembly, a boring bar mounted in the sleeve, a motorconnected to the lower end of the bar, a grinding wheel operativelyconnected to the motor, means to rotate the annular bearing plate, meansto transversely move the cross feed assembly bracket and means tolongitudinally feed the boring bar through the arbor guide sleeve.

8. In a device as described, the combination of a lower annular steppedbase member adapted to seat on a pump or the like at an opening therein,an upper annular base member removably secured to the lower base memberand having an annular bottom wall and a peripheral outer wall, anannular bearing plate rotatably mounted to fit inside said latter walls,a pair of parallel and transverse guide bars rigidly connected to theannular bearing plate, a cross feed bracket assembly slidably mounted onthe guide bars, an arbor guide assembly including a sleeve pivotallyconnected to the said bracket assembly, a boring bar extending throughthe sleeve, a motor with a grinding wheel -operatively connected to thesaid bar, means reacting between the upper base member and the annularbearing plate to rotate said plate, means reacting between the crossfeed bracket assembly and the annular bearing plate to shift saidyassembly transversely and means operatively connected between theboring bar and the arbor guide assembly to shift the boring barlongitudinally.

9. In a device as described, the combination of a baseV ladapted to seaton a pump or the like at an opening, an arbor guide assembly having asleeve, a boring bar extending therethrough with a motor and a grinderon one end of the bar, means to adjust the bar longitudinally as to thesleeve, a connecting structure between the arbor guide assembly and thebase for rotational and radial movement of the said arbor guide assemblyand means offset from the axis of the boring bar to tilt the sleeve ofthe arbor guide assembly relative to the axis of the work to be ground.

10. In a device as described, the combination of a base adapted to seaton a pump or the like at an opening for grinding a tapered surfacelocated in the pump inside of said opening, an arbor guide assemblyincluding a sleeve, a longitudinal plate attached to the sleeve at oneside, a boring bar extending through the sleeve and having a motor witha grinder on the end of the bar below the said base, meansinterconnecting the arbor guide assembly and the boring bar torectilineally Irl-ove said bar in relation to the sleeve, a bracketpost, means forming a pivotal connection between the bracket post andthe said plate adjacent the lower end of the plate oset from the axis ofthe boring bar. an adjusting means interconnecting the plate and thesaid post to adjust the tilt of the plate and hence the sleeve andboring bar, a movable mounting between the said base and the bracketpost including means for rotational movement and means for radialmovement of the boring bar in reference to the tapered surface to beground.

11. In a device as described, the combination of a base ladapted to seaton a pump or the like ai? an Opening fOr grinding of a tapered surfacealigned with such opening, a boring bar extending through the base andhaving a motor to be located between the opening of the pump and thesurface to be ground, a grinding wheel operatively connected to themotor to operate on the surface to be ground, a movable supporting andinterconnecting assembly between the base and the boring bar havingprovision for rotational movement of the boring bar, a radial movementthereof, a longitudinal movement of the boring bar in reference to thesurface to be ground and means offset from the axis of the boring bar totilt such bar.

12. In a device as described, the combination of a base adapted to seaton a pump or the like at an opening for grinding of a tapered surfacealigned with such opening, a boring bar extending through the base andhaving -a motor to be located between the opening of the pump and thesurface to be ground, a` grinding wheel operatively connected to themotor to operate on the surface to be ground, a movable supporting andinterconnecting assembly between the base and the boring bar havingprovision for rotational movement of the boring bar, a radial movementthereof and a longitudinal movement of the boring bar in reference tothe surface to be ground, the said boring bar having an electricalconnection at the top and an electric motor with current conductingmeans extending through the boring bar.

13. In a device as described, the combination of a base adapted to seaton a pump or the like at an opening for grinding of a tapered surfacealigned with such opening, a boring bar extending through the base andhaving a motor to be located between the opening of the pump and thesurface to be ground, a grinding wheel operatively connected to themotor to operate on the surface to be ground, a movable supporting andinterconnecting -assembly between the base and the boring bar, havingprovision for rotational movement of the boring bar, a radial movementthereof, a longitudinal movement of the boring bar in reference to thesurface to be ground, and means offset from the axis of the boring barto tilt such bar the boring bar having an opening therethrough, acompressed air connection at the top, a compressed air motor with acompressed airI connection to the hollow boring bar.

14. In a device as described, the combination of a base member adaptedto seat on a pump or the like at an opening to position a grinder tooperate on an internal tapered surface of the pump spaced from theopening, a boring bar extending through the base and having a motor witha grinding wheel operatively connected thereto, the .motor being adaptedfor location in 4the space between the opening of the pump and thetapered surface to the ground, a movable and adjusting assembly betweenthe base and the boring bar to locate the boring bar axial as to thesurface to be ground or at a tilt parallel to one side of the taperedsurface, the assembly including means to move the boring barrectilineally and means to rotate the boring bar in a circle relative tothe surface to be ground and radially relative to the surface to beground and means offset from the axis of the boring bar to tilt suchbar.

l5. In a device as described, an annular lower base having means tocenter in an opening in a pump-like structure and to be supported by thepump and centered by the opening, an upper base having an internalannular bearing detachably connected to said lower base, a bearing ringassembly rotatably mounted on said annular bearing, a bar mounted on thesaid ring assembly and extending through the upper and lower base andinto the opening, a motor and a grinder mounted on the bar, means on thering assembly to tilt the bar relative to the axis of the opening toposition the grinder with its grinding surface on a taper to be groundand means to rotate the said ring assembly and hence the bar with themotor in a circle to grind the desired tapered surface in a completecircle, means to advance the bar and hence the grinder longitudinally ofthe surface to be ground.

16. In a device as described, an annular lower base having means tocenter in an opening in a pump-like structure and to be supported by thepump and centered by the opening, an upper base having an internalannular bearing de- 4tachably connected to said lower base, a bearingplate rotatably mounted in said annular bearing, a ring gear attached tosaid bearing plate, a bar with a support mounted on said ring gear andextending into the opening, a motor and a grinder mounted on the bar,means on the bar support to tilt the bar relative to the axis of theopening to position the grinder with its grinding surface on a taper tobe ground and means to rotate the said ring gear and hence the bar withthe motor in a circle to grind the desired tapered surface in a completecircle, means mounted on the bar support to move the bar and hence thegrinder in a radial direction as to the axis of the surface to be groundto grind to the desired depth and means mounted on the bar support toadvance the bar and hence the grinder longitudinally of the surface tobe ground.

lR. E. GIGNOUX.

